A metal cube is floating in mercury in a bottle. The bottle is connected to a vacuum pump so that all the air in it is evacuated.Find whether the submerged part of metal cube will increase or decrease. Explain why ?

A piece of wood is floating in water kept in a bottle. The bottle is connected to an air pump. Neglect the compressibility of water. When more air is pushed into the bottle from the pump, the piece of wood will float with

A piece of wood is floating in water kept in a bottle. The bottle is connected to an air pump. Neglect the compressibility of water. When more air is pushed into the bottle from the pump, the piece of wood will float with:

A cubical block is floating inside a bath. The temperature of system is increased by small temperature delta(T) . It was found that the depth of submerged portion of cube does not change. Find the relation between coefficient of linear expansion (alpha) of the cube and volume expansion of liquid (gamma) .

A piece of metal floats on mercury. The coefficient of volume expansion of metal and mercury are gamma_1 and gamma_2 , respectively. if the temperature of both mercury and metal are increased by an amount Delta T , by what factor does the frection of the volume of the metal submerged in mercury changes ?

A piece of metal floats on mercury. The coefficients of volume expansion of the metal and mercury are gamma_1 and gamma_2 respectively. If the temperatures of both mercury and the metal are increased by an amount DeltaT , the fraction of the volume of the metal submerged in mercury changes by the factor............

A cube of iron of edge 5 cm floats on the surface of mercury, contained in a tank. Water is then poured on top, so that the cube just gets immersed. Find the depth of water layer. (Specific gravities of iron-and mercury are 7.8 and 13.6 , respectively.)

In the photoelectric effect, suppose that the intensity of the light is increased, while the frequency is kept constant. The frequency is greater than the minimum frequency f_(0) . State whether each of the following will increases, decrease, or remain constant, and explain your choice. (a) the current in the phototube, (b) the number of electrons per second from the metal surface, c) the maximum kinetic energy that an electron could have, d) the maximum momentum that an electron could have, and e) the maximum de-Broglie wavelength that an electron could have.

When a piece of metal floats in mercury at T^@C , a fraction f_1 of its volume is submerged. If their temperature is increased by Delta T ""^@C , fraction f_2 of metal piece is seen to be submerged. If the coefficients of volume expansion of the metal and the mercury are gamma_1 and gamma_2 , respectively, then the ratio f_1//f_2 is